Chemiosmosis
![An Ion gradient has potential energy and can be used to power chemical reactions when the ions pass through a channel (red).](/Images/godic/202501/04/Chemiosmosis.svg4032.png")
![Chemiosmosis in a mitochondrion.](/Images/godic/202501/04/Mitochondrial_electron_transport_chain—Etc4.svg4032.png")
![Energy conversion by the inner mitochondrial membrane and chemiosmotic coupling between the chemical energy of redox reactions in the respiratory chain and the oxidative phosphorylation catalysed by the ATP synthase [6][7] (sometimes called as](/Images/godic/202501/04/Chemiosmotic_coupling_mitochondrion4032.gif")
![A diagram of chemiosmotic phosphorylation](/Images/godic/202501/04/Electrontrans4032.png")
Chemiosmosis is the movement of ions across a selectively permeable membrane, down their electrochemical gradient. More specifically, it relates to the generation of ATP by the movement of hydrogen ions across a membrane during cellular respiration or photosynthesis.